1031 Exchange in California: Rules, Deadlines, and What the State Requires

Quick Answer

A 1031 exchange in California lets an investment property owner defer tax by reinvesting the sale proceeds in another investment property. Two federal clocks control it. The first gives 45 days to identify the replacement property in writing, and the second gives 180 days to close. Missing either clock makes the whole gain taxable, and California adds its own reporting.

Section 1031 rules verified as of July 27, 2026 against the Internal Revenue Code, the Treasury regulations, and Franchise Tax Board guidance. Analysis by Michael Mellgren, REALTOR® (DRE #02321556).

What is a 1031 exchange, and how does it work?

A 1031 exchange trades one investment property for another. It is not a sale followed by a purchase. Section 1031 of the tax code lets the owner postpone tax on the gain. Money that would go to the IRS stays invested instead.

Still, the gain is deferred rather than erased. It comes due when the replacement property finally sells in a taxable sale.

Both properties must serve a business or investment purpose. Since 2018 the rule has covered real property only. The Tax Cuts and Jobs Act dropped personal property such as cars and equipment.

Most U.S. real estate counts as like-kind to most other U.S. real estate. A rental condo can therefore trade for raw land, a fourplex, or a warehouse. That test is broader than most owners expect. Even so, three limits bite:

• Property held mainly for resale does not qualify, which rules out a flip.
• Real property outside the United States is never like-kind to real property inside it.
• A primary residence does not qualify, because it is personal use rather than investment.

Meanwhile, the sale itself still runs like any other listing. Owners weighing that half can read the step-by-step guide to how to sell a home in Orange County.

What are the deadlines for a 1031 exchange in California?

Two clocks start the day the property being sold closes. Both are federal. The first allows 45 days to identify replacement property in writing. The second allows 180 days to receive it, or until that year’s tax return is due, whichever comes first.

Neither clock stretches for hardship. The only exception is a presidentially declared disaster.

Deadline	What must happen	Where the rule comes from
Day 0, the closing of the property being sold	The relinquished property transfers and both clocks start	Treasury Regulation section 1.1031(k)-1(b)(2)
Day 45	Replacement property is identified in a signed written document delivered to the intermediary or the transferring party	Treasury Regulation section 1.1031(k)-1(b)(2)(i) and (c)(2)
Day 180, or the tax return due date, whichever is earlier	The replacement property is received	Treasury Regulation section 1.1031(k)-1(b)(2)(ii)
The tax return for the year of the exchange	Federal Form 8824 is filed with the return	IRS Instructions for Form 8824
Every year the California gain stays deferred	Form FTB 3840 is filed, when the replacement property sits outside California	Revenue and Taxation Code section 18032

Deadlines in a deferred 1031 exchange of California real property. Sources: Treasury Regulation section 1.1031(k)-1, the IRS Instructions for Form 8824, and the California Franchise Tax Board.

How replacement property gets identified

It takes a signed written document. A phone call or a handshake will not do. The document must reach the right party before midnight on day 45. That means the person obligated to transfer the property, or another party to the exchange such as the qualified intermediary.

Notice to your own attorney, accountant, or real estate agent does not count. Each property also needs a clear description: a legal description, a street address, or a known name.

Rules also cap how much an owner can identify. Pick one of three tests:

• The three-property rule. Identify up to three properties, at any value.
• The 200 percent rule. Identify any number, as long as their combined value stays at or under 200 percent of what was sold.
• The 95 percent rule. Identify any number at any value, then close on at least 95 percent of the total value identified.

Blow past all three and the law treats it as identifying nothing, which kills the exchange. Pulling one back is just as formal. It must be in writing, and it must land before day 45. An oral revocation is void, and the dropped property still counts against the caps.

The year-end trap most owners miss

A late-year closing can quietly shorten the 180 days. The exchange period ends on the 180th day or on the tax return due date, whichever comes first. So a fall closing can run out of road.

Take an individual who closes on November 1. Day 180 lands near the end of April, yet the return is due April 15. The clock stops two weeks early.

Filing an extension restores the full 180 days. That single step is the fix, and it has to happen before the return goes in.

Why the seller cannot touch the money

Receiving the sale proceeds, even briefly, disqualifies the exchange. The regulations treat actual or constructive receipt of the cash as a sale. A qualified intermediary therefore holds the funds between the two closings.

That intermediary’s written agreement must expressly bar the taxpayer from drawing on the money. The bar runs until the exchange period ends.

Who cannot serve as the qualified intermediary

Federal rules disqualify anyone who has acted as the taxpayer’s agent within the prior two years. The regulation names the employee, attorney, accountant, investment banker or broker, and real estate agent or broker. Put plainly, the agent who listed the property cannot also hold the money.

Two carve-outs are worth knowing. Prior work on other 1031 exchanges does not count against a person. Neither do routine escrow, title, or trust services from a financial institution, title company, or escrow company.

What California requires of an exchange facilitator

California regulates exchange facilitators, and most states do not. Division 20.5 of the Financial Code sets the rules. It covers anyone who facilitates an exchange for a fee, keeps an office here, or advertises the service. The requirements are specific:

• A fidelity bond of at least $1,000,000, an equivalent deposit, or all funds in a qualified escrow (section 51003).
• Errors and omissions coverage of at least $250,000, or an equivalent deposit (section 51007).
• Custody of exchange funds under a prudent investor standard, with commingling expressly a violation (section 51009).
• Written notice to clients within 10 business days of any change in control (section 51001).
• A right to sue for a violation, and to claim against the bond (sections 51005 and 51013).

These rules exist because failed intermediaries have cost taxpayers their deferral. Anyone running a 1031 exchange in California can ask a facilitator to document its bond and coverage. That takes one email, and it is worth the minute.

What California requires that federal law does not

Form FTB 3840 and the California clawback

California tracks gain that leaves the state. Say a California property trades for one outside the state. Part of the California-source gain then goes unrecognized. That triggers Form FTB 3840 for the year of the exchange.

The owner refiles it every year until the deferred gain finally lands on a California return. Franchise Tax Board guidance on reporting like-kind exchanges sets out the mechanics.

This obligation follows the gain rather than the person. It continues for an owner who has moved away and no longer files a California return. It also survives later exchanges of that out-of-state property.

Skipping it invites a Notice of Proposed Assessment. That notice adds back the deferred gain, plus penalties and interest.

Reporting ends in three narrow cases:

• Recognition of the gain on a California return.
• Transfer of the property by inheritance.
• Donation of the property to a nonprofit.

A replacement property inside California triggers no Form 3840 at all. That gain never leaves the state’s reach.

Withholding at the closing table

California withholds on real estate sales, and an exchange escapes that only up to a point. A deferred exchange is exempt at the initial transfer once the seller certifies it on Form 593. Cash or other non-like-kind property above $1,500 changes the answer. The intermediary must then withhold 3 1/3 percent of that amount.

A failed exchange is worse. If the exchange never happens, or does not qualify, the intermediary withholds 3 1/3 percent of the full sales price. On a $1,200,000 property that is roughly $40,000, recoverable only as a credit on that year’s return.

What is boot, and when is tax owed anyway?

Boot is anything received in the exchange that is not like-kind property. Usually that means cash or debt relief. Taking boot does not break the exchange, but it makes gain taxable up to the amount of the boot.

Trading down in value produces boot. So does cutting the mortgage without adding cash, even when no check changes hands.

Did the 2025 tax law change the 1031 exchange?

No. The federal tax package signed on July 4, 2025 made no change to Section 1031. Real property exchanges continue under the same rules, and proposals to cap the deferral never became law.

One earlier change still governs, however. The Tax Cuts and Jobs Act limited Section 1031 to real property beginning in 2018. California conformed for tax years starting on or after January 1, 2025. So personal property qualifies under neither system.

Frequently asked questions about a 1031 exchange in California

Can a primary residence go into a 1031 exchange?

No. Section 1031 covers property held for business use or investment, and a primary residence is personal use. A home sale falls under a separate rule with its own limits. See this guide to capital gains tax when selling a California home.

How much does a 1031 exchange cost?

Intermediary fees vary by company, and the state does not set them. That number comes from the facilitator’s own quote. Ordinary transaction costs still apply on both sides. This guide to closing costs in Orange County covers who pays each one.

Can a 1031 exchange be done with a family member?

It is possible but restricted. Under section 1031(f), a trade with a related party has a catch. Both sides must hold what they received for two years.

An early sale inside that window can undo the deferral for both parties. Run this structure past a tax professional first.

What happens if no replacement property is identified within 45 days?

The exchange fails, and the gain is taxable in the year of the sale. An intermediary releases the funds once the identification period ends. California withholding then applies to those proceeds at 3 1/3 percent of the sales price.

Weighing an exchange on an Orange County investment property?

Whether an exchange pencils out depends on the gain, the debt, the target, and the time left. Michael Mellgren, REALTOR®, follows the North Orange County investment market closely. He can help map a sale timeline against the 45-day identification window and the 180-day closing deadline.

Email Michael Mellgren about a 1031 exchange, or call or text (714) 420-6629. For the tax treatment of a specific property, consult a qualified tax professional. Engage a qualified intermediary before the sale closes rather than after.